Caulking cartridge, spout-type, end closure



June 1960 v. G. BIEDENSTEIN 2,941,697

CAULKING CARTRIDGE,SPOUT-TYPE, END CLOSURE Filed 'March 25, 1957 I 2 Sheets-Shget 1 INVENTOR. VINCENT G. BIEDENSTEIN ATTORNEY June 21, 1960 v. G. BIEDENSTEIN 2,941,697

CAULKING CARTRIDGE,SPOUTTYPE. END CLOSURE Filed March 25, 1957 2 Sheets-Sheet 2 INVENiTOR. VINCENT G. BIEDENSTEIN ATTORNEY United States Patent CAULKING CARTRIDGE, SPOUT-TYPE, END CLOSURE Vincent G. Biedenstein, Overland, M0,, assign'or R. C. Can Company, Overland, M0,, a corporation of Missourl Filed Mar. 25, 1957, Ser. No. 648,388

Claims. (Cl. 222-160) This invention relates to a dispensing type of end closure for a caulking cartridge, and more specifically to the end closure having the spout.

This type of closure usually has a plastic spout secured in a centrally located aperture in a metal cap which is crirnped to the paper can body of the caulking cartridge. The opposite end of the cartridge has a different kind of cap or closure, which, during operation, is engaged by the ram of the caulking gun. This end closure, in effect, acts like a piston in the cartridge body, forcing the caulking compound out of the spout end.

The caulking gun itself is a standard article of commerce, and will not be described here. The cartridge is merchandised separately, and may be purchased filled with any product which will flow under pressures produced by manual operation of a caulking gun. Putty or other like materials are sold packaged in this manner.

In operation, the cartridge is inserted in the gun, and the gun handle operated to force the gun ram into the cartridge, causing the compound to flow out of the spout. The end of the spout is placed over the crack to be filled, for example, and the compound is thus forced under pressure into the crack, as the end of the spout is moved along.

At the end of the crack, the. pressure of the ram is released to stop the how from the spout, but actually the discharge from. the spout .continues, and it has been observed that as much as five or six inches of compound is discharged from the spout before the pressure within the cartridge is relieved This amount of compound is Wasted or the operator must save these drippings from the gun and apply them elsewhere by some other means, such as a putty knife. In other words, the drippings represent either a waste of material or a waste of time to the operator.

It is the object of this invention to eliminate the drippings from the spout when the pressure from the ram of the gun is released. This result is obtained by applying a principle similar to the operating principle of an oil can. When pressure is released from the bottom of the oil can, the metal can bottom returns, causing a suction in the can to stop the flow of oil from the spout.

According to this invention, the end closure is flexible, resilient, and so constructed as to collapse under pressures applied in the gun and expand when gun pressure is released. This action relieves the pressure built up in the cartridge, and stops the discharge from the spout.

The objects and advantages of this invention will be more readily apparent from a reading of the following detailed description taken in connection with the accompanying drawings, in which:

Fig. 1 is a perspective view of the gun and cartridge in assembled relation with parts broken away to illustrate their position before ram pressure is applied.

Fig. 2 is a fragmentary view in longitudinal section of the cartridge and gun assembled, illustrating the position of the parts under ram pressure.

Fig. 3 is a similar view to Fig. 2, illustrating the position of the parts before ram pressure is applied by the gun or after ram pressure has been released.

Fig. 4 is a similar view to Figs. 2 and-3, illustrating the parts of the spout before assembly with the cartridge.

Fig. 1 shows a dispensing gun of conventional construction with a body formed of an open cylinder 1, and an end cap 2 secured to one end of the open cylinder 1 which is apertured at 3 to receive the spout 8 of a dispensing cartridge 11 placed within the cylinder 1. Attached at the opposite end of the cylinder 1 is a handle part 4 carrying a pivoted trigger 5, which, by some convent-ional jacking mechanism, actuates the plunger rod 6 to force the plunger (not shown) against a cap 7 slidable in the body of the cartridge, so as to force the material from the spout 8 of the cartridge.

Since the gun itself forms no part of the present'invention, it will not be described in detail.

The cartridge 11 itself has a cylindrical body as shown in Fig. 2, which is usually formed by two plies 12 and 13 of paper stock which are spirally wound and coated with adhesive.

The plunger end of the cartridge is not shown, but it will be understood that this is sealed with a form of closure such as shown in my co-pending application, Serial No. 620,887, filed November 7, 1956, now U.S. Patent No. 2,887,253, for Slip Cover and Plunger for Cartridge- Container. 7

This particular invention is concerned primarily with the apertured cap forming a dispensing type of end closure as shown in Fig. 4. The cap consists of a domeshaped cap portion 14 forming a compressible chamber Cap 14 is secured to the cylindrical body of the cartridge bya pair of rings 18 and 19. The ring 18 has a rolled edge 20 receiving the end of the cartridge tube, and a flange portion 21 for supporting the beaded edge 22 on the cap 14.

'I"n'e metal ring 19 has an opposite edge 23 which clamps the bead 22 between the flanges 21 and 23.

During assembly, the parts are positioned as shown in Fig. 4 and then forced together in a machine which rolls the edge 19 around the ring 18 and clinches the tube of the cartridge between the two rings-that is, between the outer edge 19 and the portion of the flange 20 within the tube.

Operation Figs. 2 and 3 show the position of the parts during operation of the gun. When the pressure is applied by actuation of the plunger rod 6 from the trigger 5, the cartridge is forced into the end cap 2 of the gun, causing the cap 14 to be collapsed to the position shown in Fig. 2. The cartridge body limits further movement of the cartridge after the cap 14 is collapsed. The entrance of the spout 15 may be sealed by a suitable frangible disk, or the like, which, as the pressure builds up, will rupture, allowing the caulking compound to flow from the spout 15.

At the end of the dispensing operation of the gun, the pressure on the plunger 6 is released, allowing the cap 14 to recover in a manner illustrated in Fig. 3. This expansion in the volume of the cartridge dissipates the residual pressure built up by actuation of the plunger 6 of the gun, preventing the continued discharge from the spout 15 above described.

A structure has been described which will fulfill all of the objects of the invention, but it is contemplated that other structures will occur to those skilled in the art which come within the scope of the appended claims.

I claim:

1. A caulking cartridge for a dispensing gun comprising an open-ended, tubular body, movable means in said tubular body to which a force may be applied to pressurize and discharge the contents of said cartridge; a cap with a spout on theopen end of said tubular body, oper-' able to discharge the contents when said cartridge is pres.- surized by force applied to said movable means, means on said end ofsaid tubular body having said cap, to limit movement of said cartridge when force is applied to pressurize the contents of said cartridge, and a resilient walled chamber formed by said cap adapted to be, collapsed to a degree permittedby said means to limit movement of said cartridge, when force is applied to pressurize the contents of said cartridge, said resilient walled chamber operating to expand when the force is relieved to thereby increase, the volume. of said tubular body and stop residual discharge from said cartridge.

2. A caulking cartridge for a dispensing gun comprising an open-ended, tubular body, movable means in said tubular body to which a force may be applied to pressurize the, contents of said cartridge, a cap with a spout on one end of said tubular body operable to discharge contents through said spout when a force is applied to said movable means creating internal pressure in said cartridge, means adjacent said cap endof said cartridge body to limit movement of said cartridge when force is applied to pressurize the contents of said cartridge, a resilient walled chamber adjacent said spout and positioned to be collapsed to a degree permitted by said means to limit movement of said cartridge, when the force is applied to pressurize thecontents of said cartridge, said resilient walled chamber operating to expandwhen the force is relaxed. to increase the internal volume of said tubular body of said cartridge and thereby stop the residual discharge from said cartridge.

3. A caulking cartridge for a dispensing gun comprising an open-ended tubular body, said tubular body including means to. which a force may be applied to pressurize theycontents of said cartridge, an apertured cap on the open end ofsaid tubular body operable to discharge the contents of said cartridge when pressurized by force'applied to said means, a resilient walled chamber in said cap formed by a convex surface thereof positioned to be collapsed. by a force applied to pressurize the contents of 4 h said cartridge, and said resilient walled chamber operating to expand when force is relaxed to increase the volume of said tubular body and thereby stop the discharge from said cartridge.

4. A caulking cartridge for a dispensing gun comprising an open-ended tubular body, said cartridge being adapted to be operated by' external forces thereon applied to pressurize'the contents of' said cartridge, and an aperture cap on the open, end of said tubular body operable to discharge the contents when. pressurized by forces applied to said cartridge, said cap including a convex walled portion projecting outwardly with respect to said tubular body, said convex walled portion forming a chamber positioned to be collapsed by the forces applied topressurize said cartridge, and resilient means, forming the wall of said walled chamber to expand said chamber when said forces are relaxed to increase the volume of said tubular body of said cartridge and thereby stop the discharge from said apertured cap.

5. A caulking cartridge for a dispensing gun comprising tubular body, means in one end of said tubular body to which a force may be applied to pressurize the con-.

tents. of'said cartridge, and an apertured cap on the other end of said tubular body having a spout operable to discharge the contents of said cartridge when pressurized by the force acting on said means in one direction and the force acting on said cartridge in the opposite direction to hold said cartridge, said apertured cap including a convexly curved wall mounting said spout and projecting References Cited in the file of this patent V UNITED STATES PATENTS 2,098,524 Smith Nov. 9, 1937 2,755,003 Sherbondy July 17, 1956. 2,778,541 Sherbondy J an. 22, 1957 

